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Unformatted text preview: must swim from point P to point Q at a rate of 100 ft/min. You then walk from point Q to point R at a rate of 200 ft/min. What is the shortest amount of time it takes to get from P to R ? ±or full credit on this problem you must: (a) Clearly identify a quantity to maximize or minimize. (b) Graph it. (c) Locate extrema exactly and show all work in doing so. Calculator approximations will not receive credit. 350 ft 150 ft P Q R 5 6. (15 pts.) The fgure at right is the graph oF y = 1 + x cos p πx 3 P together with its tangent line at x = 3. ±ind where the tangent line crosses the xaxis. 3 6...
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 Fall '08
 STAFF
 Calculus, Critical Point, Derivative, Mathematical analysis, 1 pt, Convex function, exact intervals

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